Table 3.

Summary of weekly absence data used in the analyses.

	Control schools		Intervention schools
	Na	%b	Na	%b
Weekly absences	12,629	22.0	11,532	21.6
Weekly absences due to respiratory illness	1055	1.8	1109	2.1
Weekly absences due to gastrointestinal illness	1409	2.5	1205	2.3
	Mean	SD	Mean	SD
Probability of absence
Any absence	0.22	0.41	0.22	0.41
Absence due to respiratory illness	0.02	0.13	0.02	0.14
Absence due to gastrointestinal illness	0.02	0.16	0.02	0.15
Head count	546.49	186.01	496.85	115.36
School level weekly absence ratioc	21.83	5.94	21.01	5.88

^aSum of students’ absence each week.

^bPercent of absences over total number of students by week.

^cNumber of students absent/total number of students.